Method of forming and attaching bolsters to cutlery implements and the bolster-blank therefor.



. 1. F. LAMB.

METHOD OF FORMING AND ATTACHING BOLSTERS T0 CUTLERY IMPLEMENTS AND IHE BOLSTE'R BLANK THEREFOR.

APPLlCATION FILED JUNE 3. 1914.

1,136,603; Patented Apr. 20, 1915.

AIM messes. Zhvanrqr:

forming and attaching bolsters JOSEPH ELAMB, NEW BRITAIN, CONNECTICUT,

CLARK, I OF NEW BRITAIN,

FFICE.

METHOD OF FORMING AND ATTAQH ING BOLSTERS TO CUTLERYIMPIJEMENTS AND THE BOIJSTER-IBLANK THEREFOR.

and useful Improvements in the Methods of- Forming and Attaching Bolsters to Cutlery Implementsand the Bolster-Blanks Therefor, of which the following is a specification.

My invention relates to the method of to cutlery implements and the blank therefor, and the objects of my improvement are simphcity and economy in construction and the production of a superior article, the process being especially adapted for producing knives and analogous flat bladed implements with a neat finish at the junction of the flat blade In the accompanying drawing :-Figure 1 is a sideelevation of 'a knife less the handle, as made by my method. Fig. 2 is an enlarged side elevation of the heel and shank portion of the knife blade. Fig. 3 is a side elevation of the bolster'blank. Fig. 4 is a sectional view of the same on the line as a: of Fig.3. Fig.5 is an endview of the said blank showing the right handendof Figs. 3 and 4. Fig. 6 is a side-elevation of the tang. Fig. 7 is a like view of a modified form of the tang. Fig. 8 is'an enlarged sectional view of the blade, bolster and tang on the line y y of Fig. 1, the outer end of the sheet metal.

' edges of the shank may be inclined a little blade and tang being broken off. Fig, 9 is a longitudinal section of the same on a plane at a right angle to the plane of Fig. 8.- Fig. 10 is a sectional view on the same scale as Fig. 2 of the bladeon the line a a of Fig. 1, looking toward the bolster. Fig. 11 is a side elevation showing ainodified form of tan Y T his invention is in the natureof an improvement in the art of forming and securlng bolsters to implements of cutlery according to my Patent No. 1,059,673, April 22, 1913.

lements .made- -from Pref bladesll with' ash ort shank 12 and a nar rfower vcentral proj ection-13'that .extends'c'entrally from the end 'of-jthe said shank. The

gousflat bladed as shownin Fig. 2 so as to make the shank Specification of Letters Patent.

that extends centrally from shank is of a width to correspond with the My present improvement is 'more' particularly designed for knives or analo.-'

or to form the=-said size the modified form larger hole in the bolster bla'nk to, receive' Patented Apr. 20, 1915.

Application filed June 3, 1914. Serial No. 842,623.

of a dove-tail form:- The shank is also prforated as at 14. The bolster blanks, Figs.

Assmnon 'ro LANDEBS, ran? a CONNECTICUT, A com-cannon.

15, a narrow rib 16 at the smaller end and a tlhicker and larger head 17 at the other en form oil or 3 and 4, so as to narrow the said head at what are to be the two broad sides 19 of the finished bolster, while at the ends 20 of the bolster which blade this head is of full thickness as most clearly shown in Figs. 1 and 3. The head v17 of the bolster blank is slotted across the end midway between the two truncated faces 18 as shown by'slot 21, Figs. 4 and 5. The

. smaller end of the bloster blank is drilled centrally as at 22, the bottom of the slot 21 at the larger end, and the largest diameter of the drill hole meeting each other so that the full diameter of the the said slot, without making any enlargement of the slot at the blade end of the bolster. The depth of the said slot equal to the length of the-blade shank longi- This head may be first made in the of a short cylinder and then slabbed truncated on twosides as at 18, Figs' come at the edges of the drill hole opens into I isfully tudinally of the blade while the diameter of i the. round head in which the said slot is formed is preferably a little in excess of the width of the said shank. The projection 13 the end of the diameter of the hole 22 in the shank end of the blade within the bolster blank. I prefer to provide the bolsterand blade with a separately formed round tang 23, but in case a 'i flat tang is desired, I extend the central projection of the blade shank, so as to obtain in addition to the dowel pin or tenon function an integral tang 13' as shownin the modifi-:

cation Fig. 11.

The separately beformed of round'wire and grooved or formed round tang 23 may I Y headed so as to form a holding shoulder 24 near one end. The said shoulderas formed i in, Fig. 6 and the modiwiththe ends of the said projection and hole of the bolster blank and the shouldered end of the tang is inserted in the round hole at the other end of the bolster, preferably tang abutting each-other. They are then secured together by pressing the bolster blank in dies, at the same time changing the round form of the bolster blank to an oval form and forcing the metal thereof solidly over the opposite edges of the shank as at 25, Fig. 9, into the hole 14 and around the inclosed shouldered end of the tang as shown in Figs. 8 and 9, thereby firmly securing the said three parts together. There is no sub- 'stantial difi'erence in the assembling and securing processes whether one-form or the other of the separately round tang-is employed but the tang which is shouldered by the heading operation is less expensive to f make. A round tang is the most desirable on account of the convenience of securing a handle thereto and a separately formed-- tang is more economical than is a flat tang formed "integral-withthe blade.

When a tang formed asshown in Fig. 11 is employed there is no change made in the bolster blank and the blade and bolster blank are assembled in precisely the same. way except for the increased length of the central projection of the shank. The bolster is secured thereon by pressure in dies, forcing the metal solidly over the opposite'edges I, of the shank and into the hole 14: as hereinbefore described and shown in Figs. 8 and- 9, while the metal of the bolster blank will be forced upon the fiat tang solidly enough for all practical'purposes.

By my improvement I am enabled toattacha separately formed bolster blank and a flat blade by an inexpensive process and at thesame time secure them beyond accidental Y displacement or loosening, and also what is u with a that of equal if-not more importance, with such a firm and compact union for the whole width of theblade that the said union is almost imperceptibleand would never be noticed by anordinary observer. I am also enabled to rovide the desirable round tang blade at a small cost. fI claim as my invention: I I I 1. That improvement in the art of form ing and securing bolsters to cutlery implements which consists in s'eparatelv formin a flat blade with a short shank and acentra projection therefrom, and a bolster blank having a groovedneck, a rib 'at one end of said neck, a transversely slotted head at the-ether end and a central hole through the ribbed end that terminates within the said slotted head, assembling the'said bolster bl anks on the shank of the said blade and positioning the same therein by having the said central projection enter the said round hole, with the flat shank filling the said slotted head at the outer end of the said hole, and then securing the bolster thereon 3. That improvement in the art of form ing and securing'bolsters to cutlery implements which consists in separately forming a fiat blade having a perforated shank and central projection therefrom, a separately formed round bolster blank, having a grooved neck, a transversely slotted head and a central round hole extending into and terminating within the slot of the said head, assembling the said parts with the perforated shank within the said slotted head and the central projection therefrom in the said round hole, and then securing the parts together-by changing the round form of the bolster blank into an oval form, forcing the metal tliereof into the perforation of the said shank and the opposite walls of the slotted head firmly together at pointsoutside the opposite edges of the said shank by pressing the said glster blank in dies.

4. That improveme "t in the art of forming and securing bolsters to cutlery implements which consists in separately forming a fiat blade having a shank'with a central projection therefrom, a separately formed round tang having a holding shoulder near one end, and a round ,bolsterblank having a slotted head and a round hole extended dered end of the said round tang within the round hole of the said bolster blank, and then pressing the said blank in dies and :forcingethe metal thereof solidly over the oppositeedges ofthe shank and solidly into engagement with the shoulderedportion of the said-tang. v -;5. A bolster blank for use. in the art of securing bolsters to separately formedi cutlery implements which consists of a sepafiatejs'ingle piece' ofthe general contour of the-finished holster, the same having a blade receiving head at :one end, the said head having a slot of uniform width from end to end and extended transversely through the said head with a substantial defth at the ophaving also a central tang receiving aperture that opensposite open ends thereof, an 

